---
title: "CLIMATHERM LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/b279779b-a860-5356-80ab-077e4e4a42a4
json: https://whiteintel.dev/api/public/dossier/b279779b-a860-5356-80ab-077e4e4a42a4
identifier: oo:GB-COH-13121891
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# CLIMATHERM LIMITED

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-13121891`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/b279779b-a860-5356-80ab-077e4e4a42a4  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/b279779b-a860-5356-80ab-077e4e4a42a4  

## Ownership & control

### Owners / controllers

- **Mr Marc James Lyon** (beneficial owner) — 100% — https://whiteintel.dev/entity/8d12f215-9b9f-59c2-8330-4a6e5e90b952
- **Mr Adam David Thurlbourn** (beneficial owner) — 50% — https://whiteintel.dev/entity/64b7a2e1-ac4f-549e-974e-a4223fd971a3
- **Mr Daniel Keir Wise** (beneficial owner) — 50% — https://whiteintel.dev/entity/0116781b-3ef6-532b-ab85-996eb586b803
- **Mr Joseph James Harrison** (beneficial owner) — 50% — https://whiteintel.dev/entity/42fb982b-326e-5f1f-a04f-eba2b332a10d
- **Mr Marc James Lyon** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/e60e7bab-a375-4fe0-ab38-88db7c65a6ca
- **NEXUS HEAT LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/89b2abfe-66ec-5b95-a1f8-920fdc1ef879
- **Mr Adam David Thurlbourn** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/d8db7f56-93b8-4b8a-ae93-051aacac03bc
- **Mr Daniel Keir Wise** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/bd556d72-f88e-4f90-a72b-046bf8c14545
- **Mr Joseph James Harrison** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/032b5eef-268d-41fc-bb04-a601c2627e5b

### UBO chain (walk to the ultimate owner)

A **19-step** ownership/control chain to the ultimate beneficial owner is resolved for this entity. The full cited chain unlocks with a paid API key or a one-off dossier — https://whiteintel.dev/pricing.

## Company profile (live · UK Companies House)

- **Company number:** `13121891`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2021-01-08
- **Registered office:** 22 Friars Street, Sudbury, CO10 2AA, England
- **SIC:** 43220

### Officers

- LYON, Marc James — director · British · appointed 2021-01-08
- THURLBOURN, Adam David — director · British · appointed 2021-01-08
- WISE, Daniel Keir — director · British · appointed 2021-01-08
- HARRISON, Joseph James — director · British · appointed 2021-01-08 · resigned 2021-10-31

### Beneficial owners (Persons with Significant Control)

- [Nexus Heat Limited](https://whiteintel.dev/entity/89b2abfe-66ec-5b95-a1f8-920fdc1ef879) — 75–100% shares · corporate PSC · United Kingdom — since 2025-09-30
- Mr Marc James Lyon — 75–100% shares · individual PSC · England — ceased 2021-01-08
- Mr Adam David Thurlbourn — 25–50% shares · individual PSC · United Kingdom — ceased 2021-01-08
- Mr Daniel Keir Wise — 25–50% shares · individual PSC · United Kingdom — ceased 2021-01-08
- Mr Joseph James Harrison — 25–50% shares · individual PSC · United Kingdom — ceased 2021-01-08

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/13121891
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/13121891

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **CLIMATHERM LIMITED**. Human view: https://whiteintel.dev/entity/b279779b-a860-5356-80ab-077e4e4a42a4 · Structured JSON: https://whiteintel.dev/api/public/dossier/b279779b-a860-5356-80ab-077e4e4a42a4._

_Risk levels are heuristic investigative leads, not legal determinations of beneficial ownership. Every claim carries a source; an absent edge means "not yet observed in current sources", not "does not exist"._